TMS320AV220 VIDEO CD MPEG DECODER

SCSS016A - JUNE 1994 - REVISED JANUARY 1996

features

• Direct Interface to the TMS320AV120 MPEG Audio Decoder and the TMS320AV420 NTSC Encoder
• Based on the C-Cube^TM CL450^TM Core
• Microcode Is Stored in an On-Chip ROM
• Audio Input Buffer Is On Chip
• Audio/Video Synchronization Logic Is Included
• Simple Microprocessor Host Interface
• Direct Interface to Either the Sony or Sanyo CD-ROM Decoders
• Video-CD Specific Functions:
  • Fast Forward and Reverse
  • Still Picture
  • Direct DRAM (Stream In) Access
• Fully Complies With All Requirements of the MPEG Standard (ISO CD 11172)
• Performs Real-Time Decoding of CIF-Resolution Bitstreams (352×240 Pixels at 30 Hz or 352×288 Pixels at 25 Hz)
• Performs Real-Time Horizontal Pixel Interpolation and Frame Duplication to Produce Output Formats of 704×240 Pixels at 60 Hz or 704×288 Pixels at 50 Hz
• Automatically Converts Decompressed Video to RGB Color-Space, Optional YCbCr Output
• Supports NTSC and PAL Video Output Timing Formats
• Interfaces to Z-80, H-8, or Similar Processors and DRAM With No External Logic
• Requires Only 4 Mbits of 80-ns DRAM to Decode CIF-Resolution MPEG Bit Streams
• Decodes Huffman Variable-Length Codes at a Peak Rate of 4 Bits Per Clock (160 Mbit/s at 40 MHz)
• Is Fabricated in EPIC^TM CMOS Process

description

The TMS320AV220 is a video CD MPEG-1 decoder designed to operate with the TMS320AV120 MPEG audio decoder to implement a complete audio and video decoder solution. It also interfaces directly with the TMS320AV420 NTSC encoder.

The TMS320AV220 is designed to be fully compatible with the video-CD and Karaoke standards and is targeted for low-cost, consumer-oriented applications. All components required to accept and decode the multiplexed MPEG-1 system stream are included on the chip, including the logic necessary for audio/video synchronization. The 'AV220 also accepts MPEG-1 packet streams. With the addition of appropriate headers, video picture streams are accepted and audio PCM data can be passed through the 'AV220 to the 'AV120 for playback in bypass mode.

The TMS320AV220/120 chip set is designed to interface to a host system through a generic 8-bit microprocessor interface. Glueless interface is possible to a Z-80, H-8, or similar processor.

The compressed MPEG-1 data-stream interface is through an 8-bit port that can directly connect to either of the popular Sanyo (LC8950 or LC8951) or Sony (CXD1186BQ) CD-ROM decoders.

View more information about generic part numbers:TMS320AV220

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